California Academy of Sciences: The Great San Francisco Earthquake of 1906
California Academy of Sciences

On April 18, 1906, a 7.9 magnitude earthquake along the San Andreas Fault would reshape the entire city.

California Academy of Sciences: Faults - Where Earthquakes Occur
California Academy of Sciences

Faults are fractures in Earth’s crust where movement has occurred.

Arizona Geological Survey: Center for Natural Hazards
The University of Arizona, Arizona Geological Survey

Natural hazards abound in Arizona. At the top of list: flash floods, severe weather, landslides and debris flows, earthquakes, and earth fissures.

Arizona Geological Survey: Earth Fissures, Subsidence & Karst in Arizona
The University of Arizona, Arizona Geological Survey

Earth fissures and subsidence threatens people and livestock, damages homes, roads, dams, and canals, and reduces property values.

Arizona Geological Survey: More on Arizona's Earth Fissures
The University of Arizona, Arizona Geological Survey

arth fissures are open surface fractures that may be up to a mile in length, up to 15 ft wide, and 10s of feet deep.

Arizona Geological Survey: Earthquakes
The University of Arizona, Arizona Geological Survey

Arizona has earthquakes; seismologists like to say, “Earthquakes don’t kill people, buildings kill people”